Zoom FaxModem 56K USB. Modem speed: 56 Kbit/s, Interface: USB, Type: V.90, K56flex, V.34, V.32bis, V.32, V.22bis, V.22 A/B, V.22, V.23, V.21, Bell 103/212A. Dimensions (WxDxH): 133 x 165 x 38 mm. Certification: FCC Parts 15B, 68 UL, C-UL CE